Apparatus for demonstrating and testing piston packing-rings.



K. D. HOLLAND. APPARATUS FOR DEMONSTRATING AND TESTING PISTON PACKINGRINGS, APPLICATION HLEb JUNE 24; ms.

1 ,241 ,849. Patented Oct. 2, 1917.

111111111 I I r I amwoz ."1 F KIRK Di I-IOLLAND, or Form: WORTH, TEXAS.

' I'm.) Y arranarus ron nnmonsrnarmexann Erns'rmc rIsToNrAcKING-nINGs.

To az'zwliomama "comm? Be it known tat I, KIRK D. HOLLAND,

a citizenioftheUnit'ed States, residing at Fort Worth, in the county ofTarrant and State. ofTexas, have invented certain new and usefulImprovements in Apparatus for Demonstrating and Testing Piston Packing-Rings, of which the following is a specification.

My invention relates to a method and apparatus for testing anddemonstrating packing rings; and the object is to provide a simpleapparatus by which packing rings can be conclusively tested and by whichthe operation or function of packing rings can be quickly and clearlydemonstrated and to provide a method of demonstrating the practicabilityof packing rings. Other objects and advanta es will be fully explainedin the following escription and the invention will be more particularlypointed out in the claims.

Reference is had to the accompanying drawings which form a part of thisapphcation.

Figure -1 is a vertical section of a cylinder, showin a piston therein.Fig. 2 is a vertical sectlon of a cylinder without a piston, the latterhaving the interior uniform from end toend and the cylinder shown inFig. 1 being smaller at the open end. Fig. 3 1s a vertical section oftwo cylinders formed of a single casting. Fi 4 is a plan view of thecylinder shown in ig. 3. Fig. 5 shows a side elevation of cylinder witha vertical slot therein.

Similar characters of reference are used to indicate the same partsthroughout the several views. I

This invention includes a cylinder 1 having a bottom 2 screwed into thecylinder and provided with a pet cock-or air cock 3. The

'cglinder 1 is tapered on the interior so that t e interior of cylinder1 is smaller near the open end than 1t is at somedistance from the openend. The part 4 is smaller than the art 3, the enlar ement being betweenthe dotted lines 5 an 6.' The open end of the cylinder 1 is beveled at 7for convenience in inserting the piston. A piston 8 is shown in thecylinder with packing rings 9.

The cylinderlO shown in Fig. 2, is of uniform size throughout itslength. This has an interior like a cylinder which has not been worn.The bottom 11 may be screwed in thecylinderup to the shoulder 12; ThisSpecification of Letters Patent.

Patented Oct. 2 1917.

npp ll cation'filed June 1916. Serial 110.105,?75.

. cylinder is provided with a cock 3 and is beveled at 13 forconvenience ininserting a piston.

If preferable, the two cylinders can be made of a single piece of metal,as shown in Figs. 3 and 4. The cylinder 14 has the same interiorconstruction as the cylinder shown in Fig. 1. The cylinder 15 has thesame interior construction as the cylinder shown in Fig. 2.

The tapering of the interior of cylinder 1 may be at different locationsfrom that shown in Fig. 1 and the'bottom of the cylinder may be formedintegral with the cylinder. Air may be admittedto the cylinder below thepistons in any suitable manner.

The purpose of the tapering of the interior of the cylinder is toillustrate the shape to which cylinders are worn in service and also toillustrate or demonstrate how exansion packing rings will expand andfolow the wall of the cylinder during service. The packing rings will becompressed and remain compressed until they pass the smaller part, ofthe interior of the cylinder. See rings 16 and 17 in Fig.5. They arepassing through the smaller part of the interior. See the same rings atposition 18 in the same Fig. 5. The rings at their'open points havespread apart. As the piston presses the rings down, the rings willexpand and press out against the larger part ofthe cylinder as soon aspressed down to the larger part and no opening between the rings and thecylinder will be left. The cylinder in Fig. 5 has a vertical slot 19so-that Various changes in the' the difi'erent parts may be made withoutdepartin from my invention.

For lllustrating the efiiciency of the pack ing rings, press a pistonwith packing rings fitted thereon down in the cylinder. If the pistongoes down easily, this means that air escapes and that the rings aredeficient. If it is diflicult to pre% the piston down,-this means thatthe rings do not let the air ass and that the rings are competent pac'ng rings and efiicient. When the pistons are to 4 be removed from thecylinders," air maybe let in the cylinder below the pistons. The devicesshown give-an accurate test of the efficiency of the rings and thedevices may be used in demonstrating the rings toprospective-pu'rchasers.

1. Packing ring testing and demonstrati255" apparatus comprising an openend cylin den, a piston ha vlng grooves therein to receive packing ringsto be forced into the said cylinder after packing rings are fitted thereend of the cylinder.

2. Packingring testing and demonstrat ing apparatus comprising acylinder 'pen- I at one'end and closed at the other end ind having asmaller boi'enear the open end of the cylinder than the bore of thegreater 15 portion of the interior, a iston having grooves therein toreceive packing rings and adapted to be forced into said cylinder afterthe packing rings are fitted thereon, and

means for letting air into thecylinder be- 20;

tween the end of the piston and the closed end of the cylinder.

In testimony whereof, I set my hand this 10th day of June, 1916.

. KIRK n. HOLLAND,

